lcmineqlem2 - Mathbox for metakunt

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Theorem lcmineqlem2 42394

Description: Part of lcm inequality lemma, this part eventually shows that F times the least common multiple of 1 to n is an integer. (Contributed by metakunt, 29-Apr-2024.)

**Hypotheses**
Ref	Expression
lcmineqlem2.1	⊢ 𝐹 = ∫(0[,]1)((𝑥↑(𝑀 − 1)) · ((1 − 𝑥)↑(𝑁 − 𝑀))) d𝑥
lcmineqlem2.2	⊢ (𝜑 → 𝑁 ∈ ℕ)
lcmineqlem2.3	⊢ (𝜑 → 𝑀 ∈ ℕ)
lcmineqlem2.4	⊢ (𝜑 → 𝑀 ≤ 𝑁)

**Assertion**
Ref	Expression
lcmineqlem2	⊢ (𝜑 → 𝐹 = Σ𝑘 ∈ (0...(𝑁 − 𝑀))(((-1↑𝑘) · ((𝑁 − 𝑀)C𝑘)) · ∫(0[,]1)((𝑥↑(𝑀 − 1)) · (𝑥↑𝑘)) d𝑥))

Distinct variable groups: 𝑘,𝑀,𝑥 𝑘,𝑁,𝑥 𝜑,𝑘,𝑥 Allowed substitution hints: 𝐹(𝑥,𝑘)

**Proof of Theorem lcmineqlem2**
Step	Hyp	Ref	Expression
1		lcmineqlem2.1	. . 3 ⊢ 𝐹 = ∫(0[,]1)((𝑥↑(𝑀 − 1)) · ((1 − 𝑥)↑(𝑁 − 𝑀))) d𝑥
2		lcmineqlem2.2	. . 3 ⊢ (𝜑 → 𝑁 ∈ ℕ)
3		lcmineqlem2.3	. . 3 ⊢ (𝜑 → 𝑀 ∈ ℕ)
4		lcmineqlem2.4	. . 3 ⊢ (𝜑 → 𝑀 ≤ 𝑁)
5	1, 2, 3, 4	lcmineqlem1 42393	. 2 ⊢ (𝜑 → 𝐹 = ∫(0[,]1)((𝑥↑(𝑀 − 1)) · Σ𝑘 ∈ (0...(𝑁 − 𝑀))(((-1↑𝑘) · ((𝑁 − 𝑀)C𝑘)) · (𝑥↑𝑘))) d𝑥)
6		eqid 2737	. . 3 ⊢ (0[,]1) = (0[,]1)
7		fzfid 13908	. . 3 ⊢ (𝜑 → (0...(𝑁 − 𝑀)) ∈ Fin)
8		0red 11147	. . 3 ⊢ (𝜑 → 0 ∈ ℝ)
9		1red 11145	. . 3 ⊢ (𝜑 → 1 ∈ ℝ)
10		unitsscn 13428	. . . . 5 ⊢ (0[,]1) ⊆ ℂ
11		resmpt 6004	. . . . 5 ⊢ ((0[,]1) ⊆ ℂ → ((𝑥 ∈ ℂ ↦ (𝑥↑(𝑀 − 1))) ↾ (0[,]1)) = (𝑥 ∈ (0[,]1) ↦ (𝑥↑(𝑀 − 1))))
12	10, 11	ax-mp 5	. . . 4 ⊢ ((𝑥 ∈ ℂ ↦ (𝑥↑(𝑀 − 1))) ↾ (0[,]1)) = (𝑥 ∈ (0[,]1) ↦ (𝑥↑(𝑀 − 1)))
13		nnm1nn0 12454	. . . . 5 ⊢ (𝑀 ∈ ℕ → (𝑀 − 1) ∈ ℕ₀)
14		expcncf 24888	. . . . 5 ⊢ ((𝑀 − 1) ∈ ℕ₀ → (𝑥 ∈ ℂ ↦ (𝑥↑(𝑀 − 1))) ∈ (ℂ–cn→ℂ))
15		rescncf 24858	. . . . . 6 ⊢ ((0[,]1) ⊆ ℂ → ((𝑥 ∈ ℂ ↦ (𝑥↑(𝑀 − 1))) ∈ (ℂ–cn→ℂ) → ((𝑥 ∈ ℂ ↦ (𝑥↑(𝑀 − 1))) ↾ (0[,]1)) ∈ ((0[,]1)–cn→ℂ)))
16	10, 15	ax-mp 5	. . . . 5 ⊢ ((𝑥 ∈ ℂ ↦ (𝑥↑(𝑀 − 1))) ∈ (ℂ–cn→ℂ) → ((𝑥 ∈ ℂ ↦ (𝑥↑(𝑀 − 1))) ↾ (0[,]1)) ∈ ((0[,]1)–cn→ℂ))
17	3, 13, 14, 16	4syl 19	. . . 4 ⊢ (𝜑 → ((𝑥 ∈ ℂ ↦ (𝑥↑(𝑀 − 1))) ↾ (0[,]1)) ∈ ((0[,]1)–cn→ℂ))
18	12, 17	eqeltrrid 2842	. . 3 ⊢ (𝜑 → (𝑥 ∈ (0[,]1) ↦ (𝑥↑(𝑀 − 1))) ∈ ((0[,]1)–cn→ℂ))
19		elfznn0 13548	. . . . . 6 ⊢ (𝑘 ∈ (0...(𝑁 − 𝑀)) → 𝑘 ∈ ℕ₀)
20		neg1cn 12142	. . . . . . 7 ⊢ -1 ∈ ℂ
21		expcl 14014	. . . . . . 7 ⊢ ((-1 ∈ ℂ ∧ 𝑘 ∈ ℕ₀) → (-1↑𝑘) ∈ ℂ)
22	20, 21	mpan 691	. . . . . 6 ⊢ (𝑘 ∈ ℕ₀ → (-1↑𝑘) ∈ ℂ)
23	19, 22	syl 17	. . . . 5 ⊢ (𝑘 ∈ (0...(𝑁 − 𝑀)) → (-1↑𝑘) ∈ ℂ)
24	23	adantl 481	. . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...(𝑁 − 𝑀))) → (-1↑𝑘) ∈ ℂ)
25	3	nnnn0d 12474	. . . . . . . 8 ⊢ (𝜑 → 𝑀 ∈ ℕ₀)
26	2	nnnn0d 12474	. . . . . . . 8 ⊢ (𝜑 → 𝑁 ∈ ℕ₀)
27		nn0sub 12463	. . . . . . . 8 ⊢ ((𝑀 ∈ ℕ₀ ∧ 𝑁 ∈ ℕ₀) → (𝑀 ≤ 𝑁 ↔ (𝑁 − 𝑀) ∈ ℕ₀))
28	25, 26, 27	syl2anc 585	. . . . . . 7 ⊢ (𝜑 → (𝑀 ≤ 𝑁 ↔ (𝑁 − 𝑀) ∈ ℕ₀))
29	4, 28	mpbid 232	. . . . . 6 ⊢ (𝜑 → (𝑁 − 𝑀) ∈ ℕ₀)
30		nn0z 12524	. . . . . . . 8 ⊢ (𝑘 ∈ ℕ₀ → 𝑘 ∈ ℤ)
31	19, 30	syl 17	. . . . . . 7 ⊢ (𝑘 ∈ (0...(𝑁 − 𝑀)) → 𝑘 ∈ ℤ)
32		bccl 14257	. . . . . . 7 ⊢ (((𝑁 − 𝑀) ∈ ℕ₀ ∧ 𝑘 ∈ ℤ) → ((𝑁 − 𝑀)C𝑘) ∈ ℕ₀)
33	31, 32	sylan2 594	. . . . . 6 ⊢ (((𝑁 − 𝑀) ∈ ℕ₀ ∧ 𝑘 ∈ (0...(𝑁 − 𝑀))) → ((𝑁 − 𝑀)C𝑘) ∈ ℕ₀)
34	29, 33	sylan 581	. . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...(𝑁 − 𝑀))) → ((𝑁 − 𝑀)C𝑘) ∈ ℕ₀)
35	34	nn0cnd 12476	. . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...(𝑁 − 𝑀))) → ((𝑁 − 𝑀)C𝑘) ∈ ℂ)
36	24, 35	mulcld 11164	. . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...(𝑁 − 𝑀))) → ((-1↑𝑘) · ((𝑁 − 𝑀)C𝑘)) ∈ ℂ)
37		resmpt 6004	. . . . . 6 ⊢ ((0[,]1) ⊆ ℂ → ((𝑥 ∈ ℂ ↦ (𝑥↑𝑘)) ↾ (0[,]1)) = (𝑥 ∈ (0[,]1) ↦ (𝑥↑𝑘)))
38	10, 37	ax-mp 5	. . . . 5 ⊢ ((𝑥 ∈ ℂ ↦ (𝑥↑𝑘)) ↾ (0[,]1)) = (𝑥 ∈ (0[,]1) ↦ (𝑥↑𝑘))
39		expcncf 24888	. . . . . . 7 ⊢ (𝑘 ∈ ℕ₀ → (𝑥 ∈ ℂ ↦ (𝑥↑𝑘)) ∈ (ℂ–cn→ℂ))
40	19, 39	syl 17	. . . . . 6 ⊢ (𝑘 ∈ (0...(𝑁 − 𝑀)) → (𝑥 ∈ ℂ ↦ (𝑥↑𝑘)) ∈ (ℂ–cn→ℂ))
41		rescncf 24858	. . . . . . 7 ⊢ ((0[,]1) ⊆ ℂ → ((𝑥 ∈ ℂ ↦ (𝑥↑𝑘)) ∈ (ℂ–cn→ℂ) → ((𝑥 ∈ ℂ ↦ (𝑥↑𝑘)) ↾ (0[,]1)) ∈ ((0[,]1)–cn→ℂ)))
42	10, 41	ax-mp 5	. . . . . 6 ⊢ ((𝑥 ∈ ℂ ↦ (𝑥↑𝑘)) ∈ (ℂ–cn→ℂ) → ((𝑥 ∈ ℂ ↦ (𝑥↑𝑘)) ↾ (0[,]1)) ∈ ((0[,]1)–cn→ℂ))
43	40, 42	syl 17	. . . . 5 ⊢ (𝑘 ∈ (0...(𝑁 − 𝑀)) → ((𝑥 ∈ ℂ ↦ (𝑥↑𝑘)) ↾ (0[,]1)) ∈ ((0[,]1)–cn→ℂ))
44	38, 43	eqeltrrid 2842	. . . 4 ⊢ (𝑘 ∈ (0...(𝑁 − 𝑀)) → (𝑥 ∈ (0[,]1) ↦ (𝑥↑𝑘)) ∈ ((0[,]1)–cn→ℂ))
45	44	adantl 481	. . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ (0...(𝑁 − 𝑀))) → (𝑥 ∈ (0[,]1) ↦ (𝑥↑𝑘)) ∈ ((0[,]1)–cn→ℂ))
46	6, 7, 8, 9, 18, 36, 45	3factsumint 42389	. 2 ⊢ (𝜑 → ∫(0[,]1)((𝑥↑(𝑀 − 1)) · Σ𝑘 ∈ (0...(𝑁 − 𝑀))(((-1↑𝑘) · ((𝑁 − 𝑀)C𝑘)) · (𝑥↑𝑘))) d𝑥 = Σ𝑘 ∈ (0...(𝑁 − 𝑀))(((-1↑𝑘) · ((𝑁 − 𝑀)C𝑘)) · ∫(0[,]1)((𝑥↑(𝑀 − 1)) · (𝑥↑𝑘)) d𝑥))
47	5, 46	eqtrd 2772	1 ⊢ (𝜑 → 𝐹 = Σ𝑘 ∈ (0...(𝑁 − 𝑀))(((-1↑𝑘) · ((𝑁 − 𝑀)C𝑘)) · ∫(0[,]1)((𝑥↑(𝑀 − 1)) · (𝑥↑𝑘)) d𝑥))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 = wceq 1542 ∈ wcel 2114 ⊆ wss 3903 class class class wbr 5100 ↦ cmpt 5181 ↾ cres 5634 (class class class)co 7368 ℂcc 11036 0cc0 11038 1c1 11039 · cmul 11043 ≤ cle 11179 − cmin 11376 -cneg 11377 ℕcn 12157 ℕ₀cn0 12413 ℤcz 12500 [,]cicc 13276 ...cfz 13435 ↑cexp 13996 Ccbc 14237 Σcsu 15621 –cn→ccncf 24837 ∫citg 25587

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-rep 5226 ax-sep 5243 ax-nul 5253 ax-pow 5312 ax-pr 5379 ax-un 7690 ax-inf2 9562 ax-cc 10357 ax-cnex 11094 ax-resscn 11095 ax-1cn 11096 ax-icn 11097 ax-addcl 11098 ax-addrcl 11099 ax-mulcl 11100 ax-mulrcl 11101 ax-mulcom 11102 ax-addass 11103 ax-mulass 11104 ax-distr 11105 ax-i2m1 11106 ax-1ne0 11107 ax-1rid 11108 ax-rnegex 11109 ax-rrecex 11110 ax-cnre 11111 ax-pre-lttri 11112 ax-pre-lttrn 11113 ax-pre-ltadd 11114 ax-pre-mulgt0 11115 ax-pre-sup 11116 ax-addf 11117

This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-rmo 3352 df-reu 3353 df-rab 3402 df-v 3444 df-sbc 3743 df-csb 3852 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-pss 3923 df-nul 4288 df-if 4482 df-pw 4558 df-sn 4583 df-pr 4585 df-tp 4587 df-op 4589 df-uni 4866 df-int 4905 df-iun 4950 df-iin 4951 df-disj 5068 df-br 5101 df-opab 5163 df-mpt 5182 df-tr 5208 df-id 5527 df-eprel 5532 df-po 5540 df-so 5541 df-fr 5585 df-se 5586 df-we 5587 df-xp 5638 df-rel 5639 df-cnv 5640 df-co 5641 df-dm 5642 df-rn 5643 df-res 5644 df-ima 5645 df-pred 6267 df-ord 6328 df-on 6329 df-lim 6330 df-suc 6331 df-iota 6456 df-fun 6502 df-fn 6503 df-f 6504 df-f1 6505 df-fo 6506 df-f1o 6507 df-fv 6508 df-isom 6509 df-riota 7325 df-ov 7371 df-oprab 7372 df-mpo 7373 df-of 7632 df-ofr 7633 df-om 7819 df-1st 7943 df-2nd 7944 df-supp 8113 df-frecs 8233 df-wrecs 8264 df-recs 8313 df-rdg 8351 df-1o 8407 df-2o 8408 df-oadd 8411 df-omul 8412 df-er 8645 df-map 8777 df-pm 8778 df-ixp 8848 df-en 8896 df-dom 8897 df-sdom 8898 df-fin 8899 df-fsupp 9277 df-fi 9326 df-sup 9357 df-inf 9358 df-oi 9427 df-dju 9825 df-card 9863 df-acn 9866 df-pnf 11180 df-mnf 11181 df-xr 11182 df-ltxr 11183 df-le 11184 df-sub 11378 df-neg 11379 df-div 11807 df-nn 12158 df-2 12220 df-3 12221 df-4 12222 df-5 12223 df-6 12224 df-7 12225 df-8 12226 df-9 12227 df-n0 12414 df-z 12501 df-dec 12620 df-uz 12764 df-q 12874 df-rp 12918 df-xneg 13038 df-xadd 13039 df-xmul 13040 df-ioo 13277 df-ioc 13278 df-ico 13279 df-icc 13280 df-fz 13436 df-fzo 13583 df-fl 13724 df-mod 13802 df-seq 13937 df-exp 13997 df-fac 14209 df-bc 14238 df-hash 14266 df-cj 15034 df-re 15035 df-im 15036 df-sqrt 15170 df-abs 15171 df-limsup 15406 df-clim 15423 df-rlim 15424 df-sum 15622 df-struct 17086 df-sets 17103 df-slot 17121 df-ndx 17133 df-base 17149 df-ress 17170 df-plusg 17202 df-mulr 17203 df-starv 17204 df-sca 17205 df-vsca 17206 df-ip 17207 df-tset 17208 df-ple 17209 df-ds 17211 df-unif 17212 df-hom 17213 df-cco 17214 df-rest 17354 df-topn 17355 df-0g 17373 df-gsum 17374 df-topgen 17375 df-pt 17376 df-prds 17379 df-xrs 17435 df-qtop 17440 df-imas 17441 df-xps 17443 df-mre 17517 df-mrc 17518 df-acs 17520 df-mgm 18577 df-sgrp 18656 df-mnd 18672 df-submnd 18721 df-mulg 19010 df-cntz 19258 df-cmn 19723 df-psmet 21313 df-xmet 21314 df-met 21315 df-bl 21316 df-mopn 21317 df-cnfld 21322 df-top 22850 df-topon 22867 df-topsp 22889 df-bases 22902 df-cn 23183 df-cnp 23184 df-cmp 23343 df-tx 23518 df-hmeo 23711 df-xms 24276 df-ms 24277 df-tms 24278 df-cncf 24839 df-ovol 25433 df-vol 25434 df-mbf 25588 df-itg1 25589 df-itg2 25590 df-ibl 25591 df-itg 25592 df-0p 25639

This theorem is referenced by: lcmineqlem3 42395

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